SAP Message 01430 - The new child system & is not included in the CUA

Diagnosis
You have added a new child system, but it was not selected.

Procedure
You now have the following options:
If you confirm the dialog box with "Continue" or Enter, only theselected child systems are included in the CUA. System &V1& is notintegrated into the CUA landscape.
If you choose "Cancel" in the dialog box, you return to change mode. Youcan select system &V1& there and then trigger the save again.